Answer: Dead nettle, a low-growing invasive annual weed, enjoys the same kinds of growing conditions favored by turf grasses. It has a square-shaped stem and produces purple flowers. Henbit, another weed, looks very similar. You can eliminate the weeds with a broadleaf weed killer such as 2,4-D. Broadleaf weed killers will not harm grasses.
Best wishes with your lawn!
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